Are you well compensated for proprietary work? Currently, it's very common to develop reputation, or even learn development, in open source, and then transition

Are you well compensated for proprietary work? Currently, it's very common to develop reputation, or even learn development, in open source, and then transition to a job in proprietary development. Would you agree that means there's a break-even point, where programmers have learned enough from open source to earn well as proprietary developers, and lose any financial incentive to contribute open source on their own, without patronage?